Improvement in stop-motions for knitting-machines



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UNITED STATES;

PATENT OFFICE.

BENJAMIN L. MACK, CE EssEX, CONNECTICUT.

IMPROVEMENT IN STOP-MOTIONS FOB. KNlTTlNG-MACHINES.

Specification forming part of Letters Patent No. 42,6?2, dated May 10, 1864.

VTo all uhom 'it may concern Be it known that I, BENJAMIN L. MACK, of Essex, in the county of Middlesex and State of Connecticut, have invented a new and Improved Stop-Motion for Knitting-Illa chines; and l do hereby declare that the fol. and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a front view oi the stop motion. Fig. 2 is a plan of the same.

Similar letters of reference indicate corresponding parts in both iignres.

This invention consists in the arrangement of a locking device in combination with the belt shipper, whereby the yarn in passing from the bobbin to the conductor of the machine is caused to hold up the said lever, and makes it lock the shipper in condition to keep themachinc running; but when the yarn gives out or breaks, the said lever, being` no longer held up, is acted upon by gravitation in such manner as to unlock the shipper and allow the machine to be put out of gear by the spring 0r its equivalent provided for the purpose.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.- A

Ais a horizontal plate, intended to be bolted to the bed plate or frame otl the knitting-machine. This plate has cast with or firmly secured to it a small upright standard, B, and two bearings, a a, to receive the horizontal sliding rod C, which carries the belt-shipper D. The rod C has applied to it a spring, b,

which always tends to push it in a direction to keep the belt on the loose pulley or to ship it from the fast tov the loose one. One end of the rod G is connected with the lower end of a short lever, E, which works on a iixed fulcrum-pin, c, secured in the lower part of the standard B. This lever is slotted longitudinally, as shown at d in Fig. l, where the fulcrum passes through it to allow the lever to slide on the pin far enough to permit the rod Cto have a rectilinear motion. The upper end of the said lever is formed with an arc, e, in the edge ot' which there is a notch,f.

F is the locking lever, which constitutes the principal feature of my invention, arranged to work on a xed fulcrum secured in the upper part ot' the standard B. rThis lever has a longer and a shorter arm, and the end of the shorter arm is turned down to form a tooth, h, to enter the notch f of the lever E, for the purpose of locking the said lever in the position shown in black outline in Fig. 1, in which position it keeps the shipper opposite to the fast pulley and the belt on that pulley. The end of the longer arm ot' the said locking-lever-is made with an inverted hook or crook, fi, to serve as a guide for the yarn]` ou its way from the bobbin to the conductor of the machine.

On the top of the standard B there is a tlxed guide, G, over which the yarn passes. The excess of weight of the longer arm ofthe lever F over that of' the shorter arin is supported by the yarn between the bobbin and the guide B, so long as any yarn remains on the bobbin and while it is unbroken between the bobbin and the needles. When the yarn breaks or gives out, and so ceases to support the longer and heavier arm ofthe lockinglever F, the said arm drops, as shown in red: outlines in Fig. l, and raises the tooth IL ont ot the notchf, thereby unlocking the lever E and leaving the rod C under the inuence of the spring b, which moves it and the attached beltshippcr to a position to throw the machine out ot' gear.

l/Vhat l claim as my invention, and desire to secure by Letters Patent, is-A The locking-lever F, having a heavier arm to be supported by the yarn and a lightertoothed arm, in combination with a notched lever, E, connected with a spring shipper, all substantially as and for the purpose herein described.

BENJAMIN L. MACK. Witnesses:

EDWD. W. REDFIELD, GAENCE O. SPENCER. 

